html,body,#app{
    background-size:cover;
    background: url("pict.png") no-repeat fixed;
    width: 1500px;
    height: 100%;
    margin: 10px;
    padding: 0;
}
.el-header{
    background-color: #333744;
    color: #333;
    text-align: center;
    line-height: 60px;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    font-size: 30px;
    color: white;
    width: 1440px;

}
.el-aside{
    background-color: #B3C0D1;
    height: 800px;
}
.el-main{
    background-color: aliceblue;
    width: 500px;
}
.el-breadcrumb{
    margin-bottom: 15px;
}
.el-card{
    width: 1200px;
}
